A flyer I have created using a QR Code as the main advertising theme.  This is a fully working link to the logo I have placed in the centre.  Having researched QR Hacking I learnt that, depending on the size of the code, a certain percentage of pixels are not used, making it possible to either manipulate them or place a picture over the top of them.  I acquired the logo from the West Yorkshire Print Workshop site, which is what they use to present their business, publicly, according to their website in February 2012.